Wow, some incredible examples on this thread! Still drooling over Indy Magnoli's Red Book of Westmarch. This topic is close to my heart, as I once compiled a list of fictional books that I'd love to make props for. Alas, as my ambition outpaces my skills by unheard of levels of magnitude, none of them have seen the light of day, at least not by my hands. Anyway, here are some titles I'd love to see made real:
The Whole Art of Detection, by Sherlock Holmes
Inkheart, by Fenoglio
Any of Oolon Colluphid's books
Ten Nights in Ten Haunted Houses by Michael Enslin
Borges' legendary Book of Sand